CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2023	Jan. 31, 2022
Income Statement [Abstract]
Revenues	$ 38,018	$ 31,508	$ 109,467	$ 88,371
Cost of revenues	28,193	22,421	86,378	58,707
Gross profit	9,825	9,087	23,089	29,664
Operating expenses:
Selling, general and administrative	7,107	5,818	20,320	15,311
Total operating expenses	7,107	5,818	20,320	15,311
Operating income	2,718	3,269	2,769	14,353
Interest expense	(620)	(718)	(1,841)	(2,125)
Other income (expense), net	432	(303)	627	(154)
Net income before income taxes	2,530	2,248	1,555	12,074
Income tax expense	2,069	0	686	0
Net income	461	2,248	869	12,074
Comprehensive income	$ 461	$ 2,248	$ 869	$ 12,074
Net income per share:
Basic	$ 0.01	$ 0.04	$ 0.01	$ 0.20
Diluted	$ 0.01	$ 0.04	$ 0.01	$ 0.19
Weighted average common shares outstanding:
Basic	62,388	61,631	62,166	61,394
Diluted	63,726	63,872	63,634	63,711